net7.0 
namespace Microsoft.Maui.Controls.Internals
{
    [EditorBrowsable(EditorBrowsableState.Never)]
    public class NotifyCollectionChangedEventArgsEx : NotifyCollectionChangedEventArgs
    {
        public int Count { get; }
    }
}
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Reference this API
.NET 6.07.0
Information specific to net7.0
Assembly

Microsoft.Maui.Controls , Version=1.0.0.0, PublicKeyToken=

Referencing

Requires all:

  • You need to have the workload maui installed.

  • Your project needs to set <UseMaui>True</UseMaui>.

Platform Restrictions

The property getter is supported on all platforms.

  • Built-in API
  • Package-provided API